Ornamental design for a watch dial



FIG. 1 is a top plan view of a watch dial showing my new design; and,

FIG. 2 is a top plan view of a watch dial showing my new design inenvironmental structure comprising a wrist watch.

The broken lines showing of a wrist watch is for illustrative purposesonly and forms no part of the claimed design.

The dial is of no appreciable thickness and has a rear which is flat,plain and unornamented.

The ornamental design for a watch dial, as shown and described.